A high quality model slide rule by Aristo from Germany. This double sided (duplex) Aristo 0968 slide rule comes complete with the Aristo marked box, the original manual (in Dutch) and the 2 small feet to put it on your desk. Everything is complete and good condition with clear signs of use and age. The curser is complete and working. It measures ca. 34 cm or 14 inches. Check the attached video on how to work your vintage man tool : slide rule operation instructions!